All Of The Most Shocking Moments In GRAMMY History

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Kristen Wiig did her best Sia impersonation in 2015.

Why jaws dropped:
Hilarious actress Kristen Wiig is no stranger to shock-and-awe. Throughout her career, the star has split our sides with her over-the-top film and TV appearances, reminding us that life's too short to take too yourself too seriously.

At the 2015 GRAMMYs, the funny lady joined Sia on stage for a quirky performance of the GRAMMY-nominated track "Chandelier." Dressed in a skin-tone leotard and iconic blonde bob, Kristen pranced around the stage, lip-syncing and fake-fighting with tiny dancer and music video star Maddie Ziegler.